Common names

Purple top verbena, South American vervain, Tall verbena, Vervain

Description

Verbena bonariensis (Purple top verbena). This is a tall perennial, which is grown as an annual, and produces deep purple flowers from mid summer to early autumn. The deeply toothed leaves cluster in a mounded rosette.

Cultivation

They are marginally frost hardy to frost tender. Grow them in medium, well-drained soil in full sun or at most partial-shade.